package com.kuaiyiwang.springcloud.lb;

import jdk.nashorn.internal.objects.annotations.Where;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.stereotype.Component;
import sun.nio.ch.Net;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Component
public class MyLB implements LoadBalance {

    private AtomicInteger atomicInteger = new AtomicInteger(0);

    private final int getAndIncrement(){
        int current;
        int next;
        do{
            current = this.atomicInteger.get();
            next = current>=2147483647?0:current+1;
        } while (!this.atomicInteger.compareAndSet(current,next));

        System.out.println("******第几次访问次数：next:"+next);

        return next;
    }

    @Override
    public ServiceInstance instances(List<ServiceInstance> serviceInstances) {

        int index = getAndIncrement() % serviceInstances.size();
        return serviceInstances.get(index);
    }
}
